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Significance and Use
5.1 This test method provides a relatively simple and reliable microscopical means of measuring the phase abundance of portland cement clinker (Note 1). Microscopical point counting provides a direct measure of the clinker phase composition in contrast to the calculated Bogue phase composition (Note 2).
5.2 This test method assumes the operator is qualified to operate a reflected light microscope and the required accessories, is able to correctly prepare polished sections and use necessary etchants, and is able to correctly identify the constituent phases.
5.3 This test method may be used as part of a quality control program in cement manufacturing as well as a troubleshooting tool. Microscopic characterization of clinker phases may also aid in correlating cement properties and cement performance in concrete, to the extent that properties and performance are a function of phase composition.
1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
C150 Specification for Portland Cement
C219 Terminology Relating to Hydraulic Cement
C670 Practice for Preparing Precision and Bias Statements for Test Methods for Construction Materials
D75 Practice for Sampling Aggregates
D3665 Practice for Random Sampling of Construction Materials
ICS Number Code 91.100.10 (Cement. Gypsum. Lime. Mortar)
UNSPSC Code 30111601(Cement)